Olympic 238-502-005 High Modulus Silicone Sealant Clear
- SKU
- EDDTRADE21
Our Expert's Opinion
"Dependable performance in high temperature, high moisture sealing applications."High 238-502-005 Modulus Silicone Sealant Clear
The 238‑502‑005 High Modulus Clear Silicone Sealant is a professional‑grade, permanently flexible sealing compound designed for demanding applications across heating, plumbing, HVAC, and general building maintenance. Its high‑modulus formulation provides exceptional adhesion to metals, plastics, ceramics, glass, and coated surfaces, making it ideal for creating durable, watertight and airtight seals in both domestic and commercial environments.
This clear silicone is engineered to withstand continuous exposure to moisture, temperature fluctuations, and vibration, ensuring long‑term stability without shrinking, cracking, or degrading. Its non‑corrosive curing system makes it suitable for sensitive materials, while the high‑temperature resistance ensures reliable performance around boilers, flues, pipework, and service penetrations.
The 238‑502‑005 sealant is widely used by engineers for sealing joints, panels, housings, inspection covers, and service openings where a transparent, clean‑finish seal is preferred. Once cured, it forms a tough, elastic bond that maintains integrity even under mechanical stress or thermal expansion.
Features:
High‑modulus formulation — provides strong, rigid adhesion ideal for structural and mechanical sealing.
Clear professional finish — perfect for visible joints or where a discreet seal is required.
Excellent temperature resistance — suitable for use around boilers, heating components, and warm pipework.
Permanent flexibility — resists cracking, shrinking, and movement over time.
Waterproof and weatherproof — ideal for wet areas, condensate zones, and outdoor applications.
Non‑corrosive curing — safe for metals, electronics, and sensitive materials.
Strong adhesion to multiple substrates — bonds effectively to metal, plastic, glass, ceramics, and coated surfaces.
Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 238-502-005 |
|---|---|
| Product Code | EDDTRADE21 |
| Part Origin | Genuine |
| Part or Accessory? | Accessory |
| Brand | 0 |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
High 238-502-005 Modulus Silicone Sealant Clear
The 238‑502‑005 High Modulus Clear Silicone Sealant is a professional‑grade, permanently flexible sealing compound designed for demanding applications across heating, plumbing, HVAC, and general building maintenance. Its high‑modulus formulation provides exceptional adhesion to metals, plastics, ceramics, glass, and coated surfaces, making it ideal for creating durable, watertight and airtight seals in both domestic and commercial environments.
This clear silicone is engineered to withstand continuous exposure to moisture, temperature fluctuations, and vibration, ensuring long‑term stability without shrinking, cracking, or degrading. Its non‑corrosive curing system makes it suitable for sensitive materials, while the high‑temperature resistance ensures reliable performance around boilers, flues, pipework, and service penetrations.
The 238‑502‑005 sealant is widely used by engineers for sealing joints, panels, housings, inspection covers, and service openings where a transparent, clean‑finish seal is preferred. Once cured, it forms a tough, elastic bond that maintains integrity even under mechanical stress or thermal expansion.
Features:
High‑modulus formulation — provides strong, rigid adhesion ideal for structural and mechanical sealing.
Clear professional finish — perfect for visible joints or where a discreet seal is required.
Excellent temperature resistance — suitable for use around boilers, heating components, and warm pipework.
Permanent flexibility — resists cracking, shrinking, and movement over time.
Waterproof and weatherproof — ideal for wet areas, condensate zones, and outdoor applications.
Non‑corrosive curing — safe for metals, electronics, and sensitive materials.
Strong adhesion to multiple substrates — bonds effectively to metal, plastic, glass, ceramics, and coated surfaces.
Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 238-502-005 |
|---|---|
| Product Code | EDDTRADE21 |
| Part Origin | Genuine |
| Part or Accessory? | Accessory |
| Brand | 0 |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
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