DowIcon_Default_EventsAsset 105 chart_icon form-checkmark form-radio__bullet cog icon profile-icon-header profile-locked-icon-header cart-icon-header region-icon-header nav_call home_sds homepage_hero_new--rollover list-bullet nav-close nav-close nav-hamburger nav-right-arrow--mobile nav_brochures nav_call nav_cart nav_case_studies nav_check_mark nav_close_x nav_common_questions nav_distributor nav_driving_directions nav_exclamation_point nav_external_links nav_find_formulations nav_find_products nav_info nav_learn_how_to_use nav_literature nav_lock nav_map nav_media_center nav_pdf nav_quick_checkout nav_read_latest_news nav_sample nav_selection_guides nav_tooltip nav_white_papers noav-icon-safe-handling-18x18 pdp-add_part_number pdp-arrow--left pdp-arrow--right pdp-box Funnel pdp-list_collapse pdp-list_expand Vector Smart Object12 Vector Smart Object12 pdp-shopping_cart social_facebook social_google social_linkedin social_pinterest social_rss social_twitter social_youtube utility-search utility-tooltip voc_icon
[{"values":[{"value":"Português-Portuguese","languageCode":"pt-br","link":"javascript:void(0);"},{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"},{"value":"Español-Spanish","languageCode":"es-es","link":"javascript:void(0);"},{"value":"한국어-Korean","languageCode":"ko-kr","link":"javascript:void(0);"}],"label":"BR","default":"pt-br"},{"values":[{"value":"Português-Portuguese","languageCode":"pt-br","link":"javascript:void(0);"},{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"},{"value":"Español-Spanish","languageCode":"es-es","link":"javascript:void(0);"},{"value":"한국어-Korean","languageCode":"ko-kr","link":"javascript:void(0);"}],"label":"JP","default":"ja-jp"},{"values":[{"value":"Português-Portuguese","languageCode":"pt-br","link":"javascript:void(0);"},{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"},{"value":"Español-Spanish","languageCode":"es-es","link":"javascript:void(0);"},{"value":"한국어-Korean","languageCode":"ko-kr","link":"javascript:void(0);"}],"label":"CN","default":"zh-cn"},{"values":[{"value":"Português-Portuguese","languageCode":"pt-br","link":"javascript:void(0);"},{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"},{"value":"Español-Spanish","languageCode":"es-es","link":"javascript:void(0);"},{"value":"한국어-Korean","languageCode":"ko-kr","link":"javascript:void(0);"}],"label":"US","default":"en-us"},{"values":[{"value":"Português-Portuguese","languageCode":"pt-br","link":"javascript:void(0);"},{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"},{"value":"Español-Spanish","languageCode":"es-es","link":"javascript:void(0);"},{"value":"한국어-Korean","languageCode":"ko-kr","link":"javascript:void(0);"}],"label":"ES","default":"es-es"},{"values":[{"value":"Português-Portuguese","languageCode":"pt-br","link":"javascript:void(0);"},{"value":"日本語-Japanese","languageCode":"ja-jp","link":"javascript:void(0);"},{"value":"中文-Chinese","languageCode":"zh-cn","link":"javascript:void(0);"},{"value":"English","languageCode":"en-us","link":"javascript:void(0);"},{"value":"Español-Spanish","languageCode":"es-es","link":"javascript:void(0);"},{"value":"한국어-Korean","languageCode":"ko-kr","link":"javascript:void(0);"}],"label":"KR","default":"ko-kr"}]

DOWSIL™ 88 Additive

A 98% actives silane/siloxane concentrate. It can be used in polar and non-polar solvent containing acrylic formulations to improve water repellency.

Benefits:

  • Solvent-free and APEO-free
  • Contribute <10 g/l VOCs when used at up to 5% by weight
  • Reduce water absorption at only 1% addition by weight
  • Negligible impact on water permeability, even at 5% addition by weight
  • Maintain paintable surfaces when used at up to 5% by weight
  • Effective in solvent-based decorative paints

Properties

These values are typical properties and are not intended for use in preparing specifications.

  • Benefit Yes No Water Resistance
  • Color Yes No Clear to Hazy
  • Nonvolatile Content Yes No 98 %
  • Shelf Life Yes No 720 Days
  • Specific Gravity @ 25°C Yes No 0.967
  • System Yes No Solvent Borne, Water Borne

High-performance additives for improved water resistance in decorative coatings

Do you want to increase the water resistance of your wood, masonry and other porous decorative coating formulations, but haven’t yet because of the high addition levels required for currently available silicone products? DOWSIL™ 88 Additive can help.

DOWSIL™ 88 Additive is a silane/siloxane blend with a VOC content of 73 g/l. It is effective at improving water resistance both in acrylic emulsion paints containing polar solvents and in solvent-based systems. This additive improves water resistance by creating a hydrophobic silicone network in the paint that repels water but is permeable to water vapor coming from the substrate. As a result, water penetration is reduced while cracking and blistering are minimized.

Performance at additive levels: reduced water absorption

Water absorption (W24) through a paint film is measured as a function of time. The lower the water absorption of a coating, the more water resistance the film offers and the greater protection it provides. Even at only 2% addition by weight, DOWSIL 88 Additive provides reduced water absorption.

With DOWSIL™ 88 Additive, addition at 5% shows even further reduction in water absorption, while a competitor silicone resin provides no additional protection when the addition level is increased from 5% to 10%.

Figure 1: W24 of an acrylic-based emulsion paint with and without DOWSIL™ 87 (A) and 88 (B) Additives and vs. a competitor silicone resin emulsion.

Graph: Acrylic-based emulsion paint with and without DOWSIL™ 87 and DOWSIL™ 88 Additives and vs. competitor silicone resin emulsion

The best of both worlds: Excellent water vapor permeability

While DOWSIL™ 88 Additive reduces water absorption, yet allows water vapor coming from the substrate to pass through the silicone network, preventing the cracking and blistering that can be a problem with some decorative coatings. Water vapor permeability is reported as the Sd value and is a function of the water vapor transmission rate.

Even in a high-PVC paint formulation that has excellent water vapor permeability DOWSIL™ 88 Additive has only a minimal impact on the Sd value when used at a high addition level (Figure 2).

Figure 2: Sd of water of a high-PVC paint formulation with and without DOWSIL™ 87 (A) and 88 (B) Additives.

Graph: High-PVC paint formulation with and without DOWSIL™ 87 and DOWSIL™ 88 Additives

No Safety Data Sheets are available online for this material
Please Contact Dow for additional information.

No Food Contact Letters are available online for this material
Please Contact Dow for additional information.

No sales specification could be found for this material in selected language

DOWSIL™ 88 Additive
No Technical Data Sheets are available online for this material.
Please Contact Dow for additional information.

CHOOSE

No Regulatory Data Sheets are available online for this product.
Please Contact Dow for additional information.

DOWSIL™ 88 Additive
Please Contact Dow for distribution options available for this product.