Powder defoamers are spray-dried or absorbed silicone, mineral oil, or tributyl phosphate-based defoaming agents supplied as free-flowing powders for incorporation into dry-mix mortar formulations. When water is added on site, the powder defoamer redisperses and acts to break foam generated during mixing — preventing air entrainment that would reduce the density, compressive strength, and waterproofing performance of tile adhesives, self-levelling screeds, grouts, and repair mortars used across GCC construction projects.
Quick Specifications
Dubai HQ: P.O. Box 29096, UAE
Riyadh: 2804 Nesaab Street, KSA
| PARAMETER | SPECIFICATION | TEST METHOD |
|---|---|---|
| Types Available | Silicone powder, mineral oil powder, TIBP-based powder | |
| Appearance | Free-flowing white to off-white powder | Visual |
| Active Defoamer Content | 50 – 100% (on carrier) | |
| Carrier | SiO₂, starch, or perlite (grade dependent) | |
| Particle Size | < 100 μm | Sieve |
| Moisture Content | ≤ 3.0 % | |
| Typical Addition Level | 0.1 – 0.5% on dry mix weight | |
| Shelf Life | 12 months sealed, < 30°C |
Tile Adhesive & Tile Grout
Controls foam generated during the high-shear mixing of tile adhesives on GCC construction sites — preventing air pockets in the adhesive bed that would reduce contact area with the tile and compromise bond strength.
Self-Levelling Underlayments
Eliminates macro-foam bubbles in pump-applied self-levelling compounds that would burst and leave pinholes on the surface — critical for the smooth finish required under resilient and ceramic flooring.
Cementitious Waterproofing Systems
Prevents air entrainment in 2K and 1K cementitious waterproofing coatings — air voids in waterproofing reduce the barrier to water ingress and create pathways for capillary absorption in GCC water features, podium decks, and wet areas.
Concrete Repair Mortars
Controls foam in hand-applied and pumpable concrete repair systems — excessive air reduces compressive strength and bond to parent concrete on GCC infrastructure and building repair projects.
Renders & Machine Plaster
Prevents foam generation in machine-applied renders during high-speed pumping and spraying on GCC building facades.
Add to dry blend at 0.1–0.3% on total dry mix weight. For self-levelling and pumpable systems where foam is most problematic, use at 0.3–0.5%. Silicone powder defoamers are most effective but can interfere with adhesion in over-dosage — test carefully. TIBP-based powder defoamers are preferred in systems where silicone compatibility is a concern. In GCC summer conditions, site mixing with hot water (> 40°C) can increase foam generation — consider slight increase in defoamer loading for summer production. Contact Raykem for grade selection.
Store in sealed bags below 30°C in a dry warehouse. Avoid moisture — powder defoamers can cake and lose activity on moisture uptake. Shelf life: 12 months.
Full Certificate of Analysis (COA), Safety Data Sheet (SDS/MSDS), and Technical Data Sheet (TDS) supplied with every shipment from Dubai or Riyadh.
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