# Neutral-Cure Clear Silicone for Brass Hardware (10.3 oz Tube) – Shower Seal Tools & Supplies – CRL RTV408C | IDEAL Shower Doors

URL: https://idealshowerdoors.com/store/p/rtv408c
Description: The CRL RTV408C is a clear neutral-cure 100% silicone in a 10.3 oz tube, used instead of acetic-cure silicone around brass shower hardware because it won't turn brass green. Made by C.R. Laurence (CRL). The silicone to use with brass hardware: won't turn brass green.
Seller: IDEAL Shower Doors, Danvers, MA (https://idealshowerdoors.com/store/)

## Product facts

- Part number: RTV408C (CRL)
- Product: Neutral-Cure Clear Silicone for Brass Hardware (10.3 oz Tube)
- Price: $25.18 each
- Glass thickness: any
- Availability: in stock
- Summary: The CRL RTV408C is a clear neutral-cure 100% silicone in a 10.3 oz tube, used instead of acetic-cure silicone around brass shower hardware because it won't turn brass green. Made by C.R. Laurence (CRL).
- Shipping: free on every order; usually ships within 3-7 business days (US only).
- CRL fees (passed on at cost, never marked up): $5.00 small-order fee on orders under $50. A single unit pays $5.00 in fees. Details: https://idealshowerdoors.com/store/policies#fees
- Returns: All sales final, no returns or exchanges. https://idealshowerdoors.com/store/policies#final
- Buy: https://idealshowerdoors.com/store/p/rtv408c

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![CRL RTV408C Neutral-Cure Clear Silicone for Brass Hardware (10.3 oz Tube) product photo](https://idealshowerdoors.com/store/img/RTV408C.webp)

CRL · Part RTV408C In stock

# Neutral-Cure Clear Silicone for Brass Hardware (10.3 oz Tube)

The silicone to use with brass hardware: won't turn brass green.

$25.18

+ Free shipping

**Ships free to your door** Free on every order to the lower 48 states and DC. Usually ships in 3–7 business days.

**Free shipping** On every order

**All sales final** Please check before you order.

**How-to guides** [Written by installers](https://idealshowerdoors.com/store/guide)

## About this product

The CRL RTV408C is a clear neutral-cure 100% silicone in a 10.3 oz tube, used instead of acetic-cure silicone around brass shower hardware because it won't turn brass green. Made by C.R. Laurence (CRL).

CRL RTV408 is a neutral-cure (non-acetic), low-odor, 100% silicone. Use it instead of standard acetic-cure silicone like 33S whenever the shower hardware is brass: acetic silicone gives off acid as it cures and can turn brass green, while RTV408 is non-corrosive to metals. It bonds to glass, ceramic tile, aluminum, stainless steel and most plastics without primer and cures to a tough, flexible rubber. Sold by the single 10.3 oz tube; fits a [standard caulking gun](https://idealshowerdoors.com/store/p/ga1204). Not for aquariums, acrylic or polyethylene plastics. Cure it in a ventilated area; curing in a closed room with no daylight can cause yellowing.

- Neutral cure: won't turn brass hardware green
- Non-corrosive to metals, low odor
- Bonds to glass, tile, aluminum and stainless steel
- One 10.3 oz tube, fits a [standard caulking gun](https://idealshowerdoors.com/store/p/ga1204)

## Fit & specs

| Spec | Value |
| --- | --- |
| Glass thickness | Any |
| Used for | Installation supplies |
| Brand | CRL |
| Cartridge Contents | 10.3 oz. (305 ml) |
| Shelf Life | 12 Months |

## Common questions

**Why does silicone turn brass green?**

Standard acetic-cure silicone gives off acetic acid (the vinegar smell) while it cures, and that acid corrodes brass. Neutral-cure silicone like RTV408C does not.

**When should I use RTV408C instead of 33S silicone?**

Whenever the shower door hardware is brass. Neutral-cure RTV408C is non-corrosive to metals, so it will not discolor brass.

**What does RTV408C not work on?**

CRL does not recommend it for aquariums, acrylic or polyethylene plastics. Cure it in a ventilated area; curing in a closed room with no daylight can cause yellowing.

**Can I return the RTV408C?**

No. All sales are final, so please check that it is the right product before you order.

More tools & supplies

## You may also need

- [IDEAL Glass Care IDEAL Bath Kit The same professional-grade system we use on your glass, now packaged for home. In three simple steps it lifts away built-up water spots and cloudy haze, seals the surface with a water-repellent protective coating, and buffs it to a brilliant shine. $64.99$84.99 View](https://idealshowerdoors.com/store/p/ideal-bath-kit)
- [CRL CAT0401436 Clear VHB Mounting Tape, 1/4" x 36' The tape for stick-on shower seals. $33.58 /roll View](https://idealshowerdoors.com/store/p/cat0401436)
- [CRL PTS89 Plastic Trim Snips for Cutting Seals The easy way to cut vinyl and plastic seals to length. $88.49 View](https://idealshowerdoors.com/store/p/pts89)
- [CRL 33SMRC Mildew-Resistant Clear Silicone Sealant (10.3 oz Tube) CRL 33S: clear, mildew-resistant 100% silicone for showers. $20.48 View](https://idealshowerdoors.com/store/p/33smrc)
- [CRL 51S Single-Edge Razor Blades (100-Pack) For scraping old silicone and VHB tape off tile, stone and glass. $17.00 / 100-pack $0.17 each · sold in packs of 100 View](https://idealshowerdoors.com/store/p/51s)

Related guide

### How to Re-Caulk a Glass Shower Door

Old silicone turns yellow, grows mildew and starts to leak.

[Read the guide →](https://idealshowerdoors.com/store/guide/how-to-recaulk-glass-shower-door)

Popular guides

### Fix it right

- [33S vs. RTV408 silicone →](https://idealshowerdoors.com/store/guide/acetic-vs-neutral-cure-silicone-33s-vs-rtv408)
- [Silicone instead of a seal? →](https://idealshowerdoors.com/store/guide/can-i-use-silicone-instead-of-a-shower-door-seal)
- [How to measure your glass →](https://idealshowerdoors.com/store/measure)
- [All guides →](https://idealshowerdoors.com/store/guide)
- [Glass Care Spotless glass Remove water spots and protect your shower glass. Shop Glass Care →](https://idealshowerdoors.com/store/glass-care)