Description
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Waterglass solution specially formulated for construction and industrial applications where a durable, water-repellent and fast-hardening matrix is required. Due to its high concentration it reacts directly with free calcium in cementitious materials, creating a dense CSH network.
CAS/EC | 1344-09-8 / 215-687-4
Delivery | Fast shipping, directly from stock
Application | Mortar & concrete, moisture injection, surface impregnation
Why choose Water Glass 37%?
Waterproofing additive – fills capillary pores and reduces water absorption in mortar and concrete.
Faster early strength – accelerates the first hydration phase, ideal for precast elements.
Versatile in use – can be used as an injection fluid against rising damp and as a surface impregnation.
Applications of Water Glass
- Mortar and concrete – add 2–5% of cement weight via the mixing water; improves density and shortens formwork removal time.
- Injection against rising damp – diluted 1:1 with demineralised water, Ø 12 mm drill holes at 10–12 cm centre-to-centre; forms an insoluble silicate gel in-situ.
- Surface impregnation – 5–10% solution wet-on-wet rolling or spraying; allow to dry for at least 8 h before further finishing.
Health and Safety
Danger
Hazard statements (H phrases)
- H318: Causes serious eye damage.
- H315: Causes skin irritation.
Precautionary measures (P-phrases)
- P264: Wash thoroughly after handling this product.
- P280: Wear protective gloves/protective clothing/eye protection/protective footwear.
- P302+P352: IF ON SKIN: Wash with plenty of water.
- P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. remove contact lenses, if possible; keep rinsing.
- P310: Immediately call a POISON CENTER/doctor.
- P321: Specific treatment (consult a physician with the Safety Data Sheet of this product).
- P332+P313: If skin irritation occurs: Get medical advice/attention.
- P362+P364: Remove contaminated clothing and wash before reuse.
FREQUENTLY ASKED QUESTIONS – FAQ
Is water glass the same as Kiesol or Glass Varnish?
Yes. It is the same sodium metasilicate solution; only the trade name is different.
How do I add water glass to mortar?
First dissolve the desired quantity in the mixing water, then add dry components. Take into account a slightly higher viscosity and process within ± 60 min.
Can water glass make concrete floors waterproof?
Addition to the concrete mix reduces capillary uptake; for existing floors, wet-on-wet impregnation or injection works better.
Is water glass flammable?
No. The solution is water based and non-flammable.
Is water glass safe for metal reinforcement?
Yes, no significant corrosion has been observed for structural steel and stainless steel; avoid direct contact with zinc or tin.
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